base model

class BaseModel extends \lithium\data\Model {
  public function save($entity, $data = null, array $options = []) {    
    $now = new \MongoDate();
    if (!$entity->exists()) {
      $entity->created = $now;
    }
    $entity->updated = $now;

    return parent::save($entity, $data, $options);
  }
}